Keywords

SNOMED CT Delta Text Definition

$79 / year

This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

SNOMED CT (SNOMED Clinical Terminology) provides a common language that assists with the electronic exchange of clinical health information. It enables a consistent way of indexing, storing, retrieving, and aggregating clinical data across specialties and sites of care. SNOMED CT Can be mapped to other coding systems, such as ICD-10, which helps facilitate semantic interoperability.

A Delta release contains only those component versions created, inactivated or changed since the previous release. The ‘Delta’ release is much smaller than a ‘Full’ release and is ideal for updating a ‘Full’ release of the previous version. Adding a ‘Delta’ release to the previous version’s ‘Full’ release will update the installation to a ‘Full’ release of the current Version.

In addition to 363 new concepts specific for the US, the March 2018 SNOMED CT US Edition also contains all of the content from the January 2018 SNOMED CT International Edition. Approximately 200 requests for terminology additions and updates were submitted via the US Content Request System (US CRS) to support US clinical health information data exchange.

Date Created

2007-04-01

Last Modified

2018-03-01

Version

2018-03-01

Update Frequency

Semiannual

Temporal Coverage

N/A

Spatial Coverage

United States

Source

John Snow Labs => International Health Terminology Standards Development Organisation (IHTSDO), U.S. National Library of Medicine (NLM)

A field that provides the unique identifier of a component or reference set member.

integer

required : 1 level : Nominal

Effective_Date

Specifies the inclusive date at which the component version's state became the then current valid state of the component

date

required : 1

Is_Active

specifies whether an identified component or is an active from the point in time specified by the Effective_Date

boolean

required : 1

Module_Id

A field in each component release file which represents the development module within which it was created and is maintained.

integer

required : 1 level : Nominal

Concept_Id

A field in the Description file that associates a term with the concept to which it applies.

integer

required : 1 level : Nominal

Language_Code

Specifies the language of the description text using the two character ISO -639-1 code. Note that this specifies a language level only, not a dialect or country code.

string

required : 1

Type_Id

A field in the Description and Relationship Release Files which contains a SNOMED CT identifier that represents the type of Description or Relationship represented.

integer

required : 1 level : Nominal

Term

A text string that represents the concept referenced by the Concept_Id field in the Description file.

string

required : 1

Case_Significance_Id

A field in the Description Release File containing a SNOMED CT identifier that indicates whether the text of the term can be modified to by switching characters from upper to lower case (or vice-versa).